The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 days. Why not try and solve them ahead of time?
Abundant Numbers (Long) in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 721st Feniske 🇫🇷 863 49 2,081ms 21 Nov 2022 721st 5quiwyrm 863 49 1,952ms 12 Dec 2024 721st DialFrost 🇸🇬 863 49 2,621ms 26 Aug 2025 724th DestyNova 🇮🇪 863 71 129ms 24 Jan 2023 725th Kaffeleif 863 76 53ms 15 Dec 2023 726th primo-ppcg 🇹🇭 862 40 146ms 20 Nov 2022 727th ovs-code 🇩🇪 862 59 492ms 16 Jan 2024 727th sisyphus-ppcg 🇦🇺 862 59 598ms 16 Jan 2024 727th SirBogman 🇺🇸 862 59 448ms 20 Jan 2024 727th m-tkach 🇺🇦 862 59 474ms 25 Jan 2024 727th CornerMercury 🇬🇧 862 59 432ms 12 Oct 2025 727th Babafaba 862 59 454ms 15 Oct 2025 727th JOrE20 862 59 378ms 22 Feb 2026 727th Seek64 🇩🇪 862 59 456ms 14 hours ago 727th Natanaelel 🇸🇪 862 59 384ms 10 hours ago 736th snoozingnewt 🇨🇦 862 116 276ms 19 Oct 2023 736th elgan65536 🇺🇸 862 116 283ms 23 Oct 2023 736th emgordon154 862 116 301ms 17 Jan 2025 736th Matter1024 🇮🇳 862 116 280ms 7 Aug 2025 740th Shanethegamer 🇺🇸 861 57 12ms 19 Nov 2022 740th jared-hughes 861 57 13ms 19 Nov 2022 740th janbehrens 🇩🇪 861 57 11ms 19 Nov 2022 740th Re-Adventures 🇮🇳 861 57 11ms 20 Nov 2022 740th BambooleanLogic 🇸🇪 861 57 10ms 20 Nov 2022 740th GeorgeStechman 🇬🇧 861 57 11ms 20 Nov 2022 740th nstearns96 🇬🇧 861 57 11ms 28 Nov 2022 740th Yewzir 🇧🇪 861 57 12ms 16 Apr 2023 740th quirked-up 861 57 13ms 30 Aug 2023 740th raszpi 🇭🇺 861 57 10ms 2 Sep 2023 740th coreynash 861 57 12ms 25 Sep 2023 740th stefangimmillaro 861 57 12ms 28 Sep 2023 740th trinityy-7 861 57 14ms 18 Oct 2023 740th dylanarmstrong 861 57 12ms 6 Dec 2023 740th jbt 861 57 12ms 26 Dec 2023 740th olleicua 🇺🇸 861 57 11ms 2 Feb 2024 740th alexsave 861 57 13ms 6 Nov 2024 740th dokutan 861 57 14ms 16 Jul 2025 740th snoozingnewt 🇨🇦 861 57 12ms 9 Oct 2025 759th Sakisan 🇧🇪 861 72 2,800ms 21 Oct 2023 760th KasperKivimaeki 🇫🇮 860 57 31ms 15 Dec 2025 761st MeWhenI 🇻🇦 860 78 112ms 23 Nov 2022 761st Betuaredead 860 78 132ms 7 Jan 2023 761st raszpi 🇭🇺 860 78 117ms 2 Sep 2023 761st dokutan 860 78 119ms 8 Aug 2024 765th KrausRaus 🇺🇸 860 87 369ms 2 Dec 2022 765th TRexOnGit 860 87 364ms 16 Jan 2024 765th amazingalek 🇳🇴 860 87 412ms 21 Jan 2026 768th MeWhenI 🇻🇦 860 93 64ms 21 Aug 2023 768th Alex-x90 🇺🇸 860 93 60ms 31 Jan 2024 768th Mandrzejy 🇵🇱 860 93 60ms 28 Mar 2024 768th Vinterion 860 93 62ms 27 May 2024 768th fuzzylojik-golf 🇺🇸 860 93 59ms 6 May 2025 768th Yax42 🇫🇷 860 93 63ms 4 Oct 2025 774th DialFrost 🇸🇬 859 62 30ms 22 Dec 2023 774th sean-niemann 🇺🇸 859 62 9ms 5 Feb 2025 774th KasperKivimaeki 🇫🇮 859 62 15ms 10 Dec 2025 777th bitsandbeyond 🇳🇱 859 92 385ms 2 hours ago 778th Yewzir 🇧🇪 859 148 1,905ms 14 Nov 2025 779th MeWhenI 🇻🇦 859 198 709ms 19 Apr 2025 780th Omega65536 🇩🇪 857 86 126ms 22 Nov 2022 780th scpchicken 🇵🇼 857 86 131ms 23 Jan 2023 780th Pale-Vessel 857 86 135ms 8 Jan 2025 780th itljan30 857 86 141ms 26 Jan 2025 780th snoozingnewt 🇨🇦 857 86 123ms 29 Sep 2025 785th madex 🇩🇪 856 70 2ms 22 Nov 2022 785th inventshah 856 70 2ms 25 Nov 2022 785th adaGrad1 856 70 2ms 3 Sep 2023 785th ListeriaM 856 70 2ms 13 Jan 2026 785th solisolu 856 70 3ms 9 days ago 790th fuzzylojik-golf 🇺🇸 856 76 11ms 22 hours ago 791st albanian-laundromat 856 114 26ms 2 Oct 2025 791st JOrE20 856 114 27ms 2 Feb 2026 793rd Shanethegamer 🇺🇸 855 89 461ms 19 Nov 2022 793rd janbehrens 🇩🇪 855 89 438ms 19 Nov 2022 793rd Ripick 855 89 471ms 27 Nov 2024 796th Just4FunCoder 854 48 56ms 2 Jul 2024 797th primo-ppcg 🇹🇭 854 54 728ms 20 Nov 2022 798th msbranicky 854 64 15ms 10 Oct 2023 799th GrayJoKing 🇦🇺 854 67 101ms 13 Sep 2024 799th Kacarott 🇦🇺 854 67 99ms 13 Sep 2024 First Prev 721–800 of 2,740 Next Last